Tension device.



PATENTED FEB.19, 1907.

0. PFKN DER. 4 TENSION DEVICE. APPLIOATION FILED SEPT.16.1905.

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PATENTBD FEB. 19, 1 907.

0. PPKNDER.

I TENSION DEVICE. APPLICATION TIL-ED SEPT. 16, 1905.

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TENSION DEVICE.

No; 84L4,892.

Specification of Letters Patent.

vPatented Feb. 18, 1907.

Application filed September 15,1805. Serial No. 278.800.

To all whom it may concern:

Be it known thatl, O'r'ro PFANDER, a subect of the German Emperor,residing at russels,in the Kingdom of Belgium, en ineer, have inventedcertain new and useful Improvements in Tension Devices, for whichapplication has been made in Belgium at the 15th January, 1905, in GreatBritain at the 27th January, 1905, and in Germany at the 8th July, 1905.

This invention relates to improvement in tension means forchainower-transmission devices for automobiles, bicycles, or any formof'power-transmission device wherein it isdesirable to regulate andcontrol the tension of the chain.

The invention consists in the provision of a tension device of thischaracter wherein the tension of the chain is regulated by varying thedistance between the centers of the wheels over which the chain runs andthe invention comprises a tension-rod revolubly mounted at one end uponthe shaft of one wheel and carrying at its opposite end arevolublymounted and adjustable eccentric member adapted to receive theshaft of the remaining wheel, together with means for adjusting andholding the eccentric member in prescribed positions. y

The invention will be more fully described drawwill be more particularlypointed out and ascertained in and by the appended claims.

In the drawings, Figure 1 is a side longitudinal section of the deviceof my invention, showing the same mounted upon the drivingshaft and rearaxle of an automobile. Fig. 2 is a longitudinal sectional view of adrivingshaft and. axle of an automobile, showing a portion .of the framein elevation and one of the rear wheels and its bearings in section andthe device of my invention mounted upon said axle and shaft, said figurebeing a 45 section on the line 2 2 of Fig. 1. y

In the drawings, represents a portion of the frame of the .ve 'cle, eone of the axles, and a: .the driving-shaft. A tension-rod, referablycomprising s lit members a and ,is'mounted on-saidax eand shaft, theaxle end of said rod comprising a disk 0, provided with a bushing d,interp and theaxle e, the'tenslon-rod being mounted in such a manner asto ermit free rotation of (fond of the rod termi the axle. The forwarnotes in a collar or strapf, in which an eccenosed between the disk tricmember 9 is revolubly mounted. Said eccentric g is provided with aflange h, through which an annular flange '1'. projects integral with astationary hub n, fixed to the frame (1.

Between the flan e i. and the driving-shaft 1c is interposed a bal-bearing m, which may be of any convenient form. The flange h extendsinwardly over the flange '1'. and terminates in an annular adjustin -rimk, fitting face to face with a disk m oi like diameter which is ri idwith the hub n. The flange h is provide intermediate the member 9 andthe rim is with a hexagonal or other like portion 7', to which a wrenchmay be applied, and the abutting; rims k. and m are rovided with indexesz and g, which indicate the adjustment of the eccentric. Bolts Zpassingthrough a plurality of holes formed in the abutting runs it and m areprovided to anchor the eccentric g in its adjusted position. When it isdesired to anchor said member, the bolts are removed and the wrench isapplied to. the part until the required tension is effected, w ereuponthe bolts are inserted in placeand the rims k and m are locked in theiradjusted position. The outer end of the shaft 11; carries the usualchain-wheel as, which, as shown, is mounted upon a squared portion ofthe driving-shaft and secured in lace by a nut and pin a although itwill e obvious that any like eflicient' means for securingthechain-wheel a may be substituted for that sh own.

' p indicates the chain-wheel connected with the rear driving-wheel ofthe vehicle, the

same having a flange w bolted to the hub of said rear wheel at w, asshown in Fig. 2. The split sections of saidtension-rod are held togetherby bolts 0, which pass through the sections, as, clearly shown inFig. 1. the tension rod and chain are housed by a casing 8, formed intwo parts, which are bolt- As shown,

ed together in any suitable manner. The

inner wall of the forward end of said casin has hearing at it upon thetension-rod, an the rear end has bearing at '0 upon said rod.

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The outer wall of said casin s'extends bei yond the driving-shaft a),inc osing the outer end of the same, and has bearing at its rear end atar upon the chain-wheel p.

I declare that what I claim is- 2 1. A device ofthe class described coming in combination, an axle, a driving-s ft a spacing or tension rodrevolub mounted at one end on said axle, and a revo uble memher for theopposite end of said rod eccentricios i ally apertured and adapted toreceive the I shaft, and means for adjusting said revolu driving-shaft.1 bly-mounted member. 10 2. A device of the class described compris- Intestimony whereof I affix my signature ing in combination, anaxle, adriving-shaft, in presence of two witnesses.

a, spacing or tension rod revoiubly mounted OTTO PFANDER.

at one end on said axle, a ievoiuble member for Witnesses: I

the opposite end of said rod eccentrically aip- S. PARETTE,

ertured and adaptedto receive the driving- GREGORY PHELAN.

